81 Ceti b (abbreviated 81 Cet b) is an
extrasolar planet approximately 331
light year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s away in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of
Cetus. It is estimated to be 5.3 times the mass of Jupiter which also makes it a gas giant.
It orbits the
G-type giant star 81 Ceti at an average distance of 2.5
AU, taking about 2.6 years to revolve with an
eccentricity of 20.6.
Discovery
The preprint announcing this planet was submitted to the
arXiv electronic repository on July 2, 2008, by Bun'ei Sato and collaborators, who discovered it using the
Doppler Spectroscopy method, during the
Okayama Planet Search
is the capital city of Okayama Prefecture in the Chūgoku region of Japan. The city was founded on June 1, 1889. , the city has an estimated population of 720,841 and a population density of 910 persons per km2. The total area is .
The city is ...
radial velocity survey of G and K giants at
Okayama Astrophysical Observatory.
See also
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14 Andromedae b
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6 Lyncis b
6 Lyncis b (abbreviated 6 Lyn b) is an extrasolar planet orbiting the K-type subgiant star 6 Lyncis which is approximately 182 light years away in the Lynx constellation. The planet has a minimum mass . The orbital period for this planet is 8 ...
*
79 Ceti b
*
94 Ceti b
References
External links
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Cetus (constellation)
Giant planets
Exoplanets discovered in 2008
Exoplanets detected by radial velocity
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